Jaffer M, Ebead A, Lee-Ruff E. Photochemical synthesis of nucleoside analogues from cyclobutanones: bicyclic and isonucleosides.
Molecules 2010;
15:3816-28. [PMID:
20657410 PMCID:
PMC6264288 DOI:
10.3390/molecules15063816]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 05/19/2010] [Accepted: 05/24/2010] [Indexed: 12/16/2022] Open
Abstract
The preparation of two nucleoside analogues are reported. Both syntheses involve a key photochemical ring-expansion of cyclobutanones to an oxacarbene and its subsequent scavenging by 6-chloropurine. The synthesis of a bicyclic (locked) purine starts from a oxabicycloheptanone with a hydroxymethyl pendant. The preparation of an isonucleoside uses a cyclobutanone with an α-substituted 6-chloropurine. Irradiation of the latter produces an isonucleoside and acyclic nucleoside analogues.
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